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The Gaia-ESO Survey :
The Gaia-ESO Survey : impact of extra mixing on C and N abundances of giant stars
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- Lagarde, N. (författare)
- Univ Bourgogne Franche Comte, OSU THETA Franche Comte Bourgogne, Observ Besancon, Inst UTINAM,CNRS,UMR 6213, BP 1615, F-25010 Besancon, France,University of Burgundy - Franche-Comté
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- Reyle, C. (författare)
- Univ Bourgogne Franche Comte, OSU THETA Franche Comte Bourgogne, Observ Besancon, Inst UTINAM,CNRS,UMR 6213, BP 1615, F-25010 Besancon, France,University of Burgundy - Franche-Comté
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- Robin, A. C. (författare)
- Univ Bourgogne Franche Comte, OSU THETA Franche Comte Bourgogne, Observ Besancon, Inst UTINAM,CNRS,UMR 6213, BP 1615, F-25010 Besancon, France,University of Burgundy - Franche-Comté
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- Tautvaisiene, G. (författare)
- Vilnius Univ, Inst Theoret Phys & Astron, Sauletekio Av 3, LT-10257 Vilnius, Lithuania,Vilnius University
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- Drazdauskas, A. (författare)
- Vilnius Univ, Inst Theoret Phys & Astron, Sauletekio Av 3, LT-10257 Vilnius, Lithuania,Vilnius University
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- Mikolaitis, S. (författare)
- Vilnius Univ, Inst Theoret Phys & Astron, Sauletekio Av 3, LT-10257 Vilnius, Lithuania,Vilnius University
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- Minkeviciute, R. (författare)
- Vilnius Univ, Inst Theoret Phys & Astron, Sauletekio Av 3, LT-10257 Vilnius, Lithuania,Vilnius University
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- Stonkute, E. (författare)
- Vilnius Univ, Inst Theoret Phys & Astron, Sauletekio Av 3, LT-10257 Vilnius, Lithuania,Vilnius University
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- Chorniy, Y. (författare)
- Vilnius Univ, Inst Theoret Phys & Astron, Sauletekio Av 3, LT-10257 Vilnius, Lithuania,Vilnius University
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- Bagdonas, V. (författare)
- Vilnius Univ, Inst Theoret Phys & Astron, Sauletekio Av 3, LT-10257 Vilnius, Lithuania,Vilnius University
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- Miglio, A. (författare)
- Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England,University of Birmingham
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- Nasello, G. (författare)
- Univ Bourgogne Franche Comte, OSU THETA Franche Comte Bourgogne, Observ Besancon, Inst UTINAM,CNRS,UMR 6213, BP 1615, F-25010 Besancon, France,University of Burgundy - Franche-Comté
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- Gilmore, G. (författare)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England,University of Cambridge,University of Padova,University of Porto
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- Randich, S. (författare)
- Osserv Astrofis Arcetri, INAF, Largo E Fermi 5, I-50125 Florence, Italy,INAF - Osservatorio Astrofisico di Arcetri,Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
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- Bensby, T. (författare)
- Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science
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- Bragaglia, A. (författare)
- Osservatorio Astron Bologna, INAF, Via Gobetti 93-3, I-40129 Bologna, Italy,INAF Osservatorio Astronomico di Bologna
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- Flaccomio, E. (författare)
- Osserv Astron Palermo, INAF, Piazza Parlamento 1, I-90134 Palermo, Italy,INAF Palermo Astronomical Observatory,Suffolk University,CSIC Centro de Astrobiologia (INTA)
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- Francois, P. (författare)
- Univ Paris Diderot, CNRS, Observ Paris, GEPI, 5 Pl Jules Janssen, F-92190 Meudon, France,Paris Diderot University
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- Korn, Andreas, 1972- (författare)
- Uppsala University,Uppsala universitet,Observationell astrofysik
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- Pancino, E. (författare)
- Osserv Astrofis Arcetri, INAF, Largo E Fermi 5, I-50125 Florence, Italy;Agenzia Spaziale Italiana, Space Sci Data Ctr, Via Politecn, I-00133 Rome, Italy,Italian Space Agency,INAF - Osservatorio Astrofisico di Arcetri
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- Smiljanic, R. (författare)
- Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland
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- Bayo, A. (författare)
- Univ Valparaiso, Inst Fis & Astron, Valparaiso, Chile,University of Valparaíso
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- Carraro, G. (författare)
- Univ Padua, Dipartimento Fis & Astron, Vicolo Osservatorio 3, I-35122 Padua, Italy
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- Costado, M. T. (författare)
- Univ Cadiz, Dept Didact, Puerto Real 11519, Cadiz, Spain,University of Cádiz,University of La Laguna (ULL),Instituto de Astrofísica de Canarias
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- Jimenez-Esteban, F. (författare)
- CSIC, INTA, Ctr Astrobiol, Dept Astrofis, ESAC Campus,Camino Bajo Castillo S-N, Madrid 28692, Spain;Suffolk Univ, Madrid Campus,C Vina 3, Madrid 28003, Spain
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- Jofre, P. (författare)
- Univ Diego Port, Fac Ingn, Nucleo Astron, Av Ejercito 441, Santiago, Chile,Diego Portales University
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- Martell, S. L. (författare)
- Univ New South Wales, Sch Phys, Sydney, NSW 2052, Australia,University of New South Wales,European Southern Observatory Santiago
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- Masseron, T. (författare)
- Inst Astrofis Canarias, Tenerife 38205, Spain;Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain
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- Monaco, L. (författare)
- Univ Andres Bello, Dept Ciencias Fis, Fernandez Concha 700, Santiago, Chile,Andrés Bello National University
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- Morbidelli, L. (författare)
- Osserv Astrofis Arcetri, INAF, Largo E Fermi 5, I-50125 Florence, Italy,INAF - Osservatorio Astrofisico di Arcetri
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- Sbordone, L. (författare)
- European Southern Observ, Alonso Cordova 3107, Santiago, Chile
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- Sousa, S. G. (författare)
- Univ Porto, CAUP, Inst Astrofis & Ciencias Espaco, Rua Estrelas, P-4150762 Porto, Portugal
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- Zaggia, S. (författare)
- Padova Observ, INAF, Vicolo Osservatorio 5, I-35122 Padua, Italy,INAF - Osservatorio Astronomico di Padova
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(creator_code:org_t)
- 2018-12-21
- 2018
- Engelska.
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Ingår i: Astronomy and Astrophysics. - : EDP SCIENCES S A. - 0004-6361 .- 1432-0746. ; 621
- Relaterad länk:
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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https://www.aanda.or...
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http://dx.doi.org/10... (free)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://lup.lub.lu.s...
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Abstract
Ämnesord
Stäng
- Context: The Gaia-ESO Public Spectroscopic Survey using FLAMES at the VLT has obtained high-resolution UVES spectra for a large number of giant stars, allowing a determination of the abundances of the key chemical elements carbon and nitrogen at their surface. The surface abundances of these chemical species are known to change in stars during their evolution on the red giant branch (RGB) after the first dredge-up episode, as a result of the extra mixing phenomena.Aims: We investigate the effects of thermohaline mixing on C and N abundances using the first comparison between the Gaia-ESO survey [C/N] determinations with simulations of the observed fields using a model of stellar population synthesis.Methods: We explore the effects of thermohaline mixing on the chemical properties of giants through stellar evolutionary models computed with the stellar evolution code STAREVOL. We include these stellar evolution models in the Besancon Galaxy model to simulate the [C/N] distributions determined from the UVES spectra of the Gaia-ESO survey and to compare them with the observations.Results: Theoretical predictions including the effect of thermohaline mixing are in good agreement with the observations. However, the field stars in the Gaia-ESO survey with C and N abundance measurements have a metallicity close to solar, where the efficiency of thermohaline mixing is not very large. The C and N abundances derived by the Gaia-ESO survey in open and globular clusters clearly show the impact of thermohaline mixing at low metallicity, which explains the [C/N] value observed in lower mass and older giant stars. Using independent observations of carbon isotopic ratio in clump field stars and open clusters, we also confirm that thermohaline mixing should be taken into account to explain the behaviour of C-12/C-13 as a function of stellar age.Conclusions: Overall, the current model including thermohaline mixing is able to reproduce very well the C and N abundances over the whole metallicity range investigated by the Gaia-ESO survey data.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- stars: abundances
- stars: evolution
- Galaxy: stellar content
- Galaxy: abundances
- Galaxy: Abundances
- Galaxy: stellar content
- Stars: Abundances
- Stars: evolution
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Till lärosätets databas
- Av författaren/redakt...
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Lagarde, N.
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Reyle, C.
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Robin, A. C.
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Tautvaisiene, G.
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Drazdauskas, A.
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Mikolaitis, S.
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visa fler...
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Minkeviciute, R.
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Stonkute, E.
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Chorniy, Y.
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Bagdonas, V.
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Miglio, A.
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Nasello, G.
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Gilmore, G.
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Randich, S.
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Bensby, T.
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Bragaglia, A.
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Flaccomio, E.
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Francois, P.
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Korn, Andreas, 1 ...
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Pancino, E.
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Smiljanic, R.
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Bayo, A.
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Carraro, G.
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Costado, M. T.
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Jimenez-Esteban, ...
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Jofre, P.
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Martell, S. L.
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Masseron, T.
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Monaco, L.
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Morbidelli, L.
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Sbordone, L.
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Sousa, S. G.
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Zaggia, S.
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